Mark has been in education for 25 years; first as a classroom teacher and then as a facilitator of learning for other teachers and school leaders. He is currently a consultant for Harvard Project Zero’s Making Thinking Visible and Cultures of Thinking initiatives. Mark has co-authored “The Power of Making Thinking Visible” and “Making Thinking Visible: How to Promote Engagement, Understanding, and Independence for All Learners” with Ron Ritchhart, principal investigator at Project Zero.